Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o número médio de eventos quando o top-5 é 1?
 ###Tabelas: CREATE TABLE jersey_progress (jersey_progress_id AUTO_INCREMENT PRIMARY KEY, Stage (Winner) VARCHAR, General Classification VARCHAR, Points Classification VARCHAR, Mountains Classification VARCHAR, Metas Volantes Classification VARCHAR, Team Classification VARCHAR) CREATE TABLE grand_slam_men's_doubles_finals:_20_16–4 (grand_slam_men's_doubles_finals:_20_16–4_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Year INT, Championship VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents VARCHAR, Score VARCHAR) CREATE TABLE winners_of_the_allaire_dupont_distaff_stakes_since_1992 (winners_of_the_allaire_dupont_distaff_stakes_since_1992_id AUTO_INCREMENT PRIMARY KEY, Year INT, Winner VARCHAR, Jockey VARCHAR, Trainer VARCHAR, Owner VARCHAR, Distance VARCHAR, Time VARCHAR, Purse VARCHAR) CREATE TABLE list_of_ministers_for_small_business (list_of_ministers_for_small_business_id AUTO_INCREMENT PRIMARY KEY, Order INT, Minister VARCHAR, Party affiliation VARCHAR, Prime Minister VARCHAR, Term start VARCHAR, Term end VARCHAR, Term in office VARCHAR) CREATE TABLE summary (summary_id AUTO_INCREMENT PRIMARY KEY, Tournament VARCHAR, Wins INT, Top-5 INT, Top-10 INT, Top-25 INT, Events INT, Cuts made INT)  
SELECT AVG Events FROM summary WHERE Top-5 = 1